Vacuum cleaner



FIG. 1 is an isometric view of a vacuum cleaner that has the design.

FIG. 2 is front elevational view of the vacuum cleaner.

FIGS. 3 and 4 are opposite side elevational views of the vacuum cleaner.

FIG. 5 is a rear elevational view of the vacuum cleaner; and,

FIG. 6 is a top plan view of the vacuum cleaner.

The bottom of the vacuum cleaner forms no part of the claimed design. 

The ornamental design for a vacuum cleaner, as shown and described. 